PS 4" 2Ohm Coaxial These weatherproof speakers are made to deliver clean, crisp music, on the road and off – even through a helmet. Tough construction that stands up to the elements is combined with high-grade sound quality, without modifying your fairing or adding extra weight. Add a PXA amplifier for a complete system, meant for rough roads, and rougher trails. These PSM speakers work best with 30 watts of recommended power. See below for more details.Specifications Woofer (in, mm) 4, 100 Tweeters (in, mm) 3/4, 20 Impedance (Ohms) 2 Recommended Amplifier Power (watts RMS) 50 Peak Power (watts, per ANSI/CTA-2031-A) 100 Sensitivity (dB 1w/1m) 85.8 Frequency Response (Hz) 100 - 20k Mounting Hole Diameter (in, mm) 3-5/8, 93 Mounting Depth (in, mm) 1-11/16, 43 Weight (oz, g) 11.9, 338 Grilles Yes Manuals 2013 PS4 Coaxial Speakers | Multilingual | Download Do you have a different model? Click Here